Boron and halide systematics in submarine hydrothermal systems: Effects of phase separation and sedimentary contributions

C. F. You, D. A. Butterfield, A. J. Spivack, J. M. Gieskes, T. Gamo, A. J. Campbell

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)

Abstract

Systematic studies of the distributions of B, δ11B, NH4, halides (Cl, Br, I) and trace alkalis (Li, Rb, Cs) in vent fluids, combined with experimental data on super- and subcritical phase separation, provide a method for separating the effects of interaction with basalts and/or sediments from those of phase separation. This allows a more general understanding of geochemical processes in submarine hydrothermal systems, especially where a connection with sediment is not otherwise obvious (e.g., Endeavour Segment, Juan de Fuca Ridge). Based on B and δ11B corrected for wallrock reactions, all published boron and chloride data from mid-ocean ridge systems (MOR) (e.g., 11°N, 13°N and 21°N of the East Pacific Rise), except for the Endeavour Segment, Juan de Fuca Ridge, are consistent with experimental phase separation data, suggesting a dominant control by the latter process. Fluids from sedimented ridge (SR) (e.g., Escanaba Trough and Guaymas Basin), and from back-arc basins (BAB) (e.g., Mariana Trough, Lau Basin and Okinawa Trough), when compared with mid-ocean ridge data, show expected effects of organic matter and/or sediment contributions. This is particularly noticeable from enhanced levels of Br, I, NH4, and trace alkali metal contents (such as Li, Rb and Cs). High B concentrations and elevated δ11B in Endeavour Segment can be explained by a small, but distinguishable contribution from sediments, which is confirmed by slightly enhanced levels of Br, I and NH4.

Original languageEnglish
Pages (from-to)227-238
Number of pages12
JournalEarth and Planetary Science Letters
Volume123
Issue number1-3
DOIs
Publication statusPublished - 1994 May

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Boron and halide systematics in submarine hydrothermal systems: Effects of phase separation and sedimentary contributions'. Together they form a unique fingerprint.

Cite this